Thrust element for cylinder liner removing and inserting tool



May 27, 1947.

G. M. GRAHAM THRUST ELEMENT FOR CYLINDER LINER REMOVING AND INSERTING TOOL Filed Dec. 21, 1944 INVENToR. vMinga aQ/l allan/riff Patented May 27, v1,947

THRUST ELEMENT FOR CYLINDER LINER REMOVING AND IN SERTING TOOL oi' Michigan Application December 21, 1944, Serial No. 569,138

This invention relates to an improved tool for inserting or removing a sleeve liner from a cylinder bore or the like.

It is common practice in internal combustion engines, and particularly engines ofthe Diesel type, to provide the combustion cylinders with sleeve liners which deiine the bores within which the pistons travel. It is the practice upon wear of the liner to remove the liner and replace it with a new one instead of trueing up the worn liner in place within the cylinder block. As such a liner fits very snugly within the bore of the block the operation of removing the liner or inserting the same is a diflicult one. This improved tool is designed for such purpose. Sleeve liners are, of course, provided in many other locations and this tool has ay wide range of utility.

An object is to provide a tool ,adapted to be used to remove a sleeve liner or to insert the same in place. More particularly'an object is to provide such a tool which is of simple, sturdy construction and which may be quickly applied to the liner to remove or insertl the same and which will so engage the-'liner as to remove it readily and without injury. The tool is adaptable for use with liners of different size. It is designed to permit the full insertion of the liner into the provided bore and to facilitate the removal of the liner from the bore.

Other objects, advantages and meritorious features will more fully appear from the following description, appended claims and accompanying drawings, wherein:

Figure 1 is a vertical sectional view through a device embodying this invention showing the device in position to withdraw a liner from the bore.

FigurevZ is a plan, partly in section, taken on the line 2-2 of Figure 1.

Figure 3 is a vertical sectional view taken on the line 3-3 of Figure 1.

the like between the two side walls 'of the yoke and spaced above the bottom thereof as illustrated in Figure 3. Within the space between the plate andthe bottom of the yoke there is provided a passage within which passage is mounted liner engaging and centering means.

This liner engaging and centering means shown in Figure 1 includes a pair of opposed end portions or complementary arms 24 connected by an adjustment screw 26. Each arm is provided at its outer end with a shoulder 25 adapted to seat within the sleeve I2 as illustrated in Figure 1 to center thesleeve engaging means with respect to the sleeve. The screw is oppositely threaded at opposite ends into the end portions 24 to project or retract such end portions upon relative rotation. The intermediate portion of the screw is provided with an encircling groove 28 adapted to receive the-inner end of a set screw 30 to center the sleeve engaging means within the yoke.

One end of the screw 26 may be provided with a kerf 32' and the arm 24 within which such end of the screw is threaded has an axial passageway therethrough of a size to receive the end of a screw driver to engage within such Figure 4 is a vertical sectional view through a device embodying this invention and showing the device in position to insert a liner into a bore. l

Figure 5 is an elevation of an extension for the puller shaft.

Figure 6 is a fragmentary elevation, partly in section of the cylinder inserting tool showing a modication as compared with the structure of Figure 4.

In the drawing let I0 indicate a cylinder block provided with a cylindrical bore within which a cylindrical liner' I2 is ldisposed. In Figure 1 the device is shown in position to engage the kerf to permit rotation of the screw to project or retract the end portions 24 upon the screw. On the other hand the set screw 30 may be backed oif suiiiciently to permit complete withdrawal of the screw connected end portions 24 endwise outvof the yoke. The two end portions 24 may then be adjusted so that the shoulders 25 willseat within the end of the sleeve I2. This sleeve engaging means can then be reinserted into the yoke and the set screw threaded inwardly to engage within the' channel 28 to position the screw connected end portions within the yoke.

A spider 32 is provided with an axial opening The legs are adjustable radially withinr the slots to `bridge bores of differentdiameters.

` the plate. v resting upon the upper end of the sleeve I2 is serving merely to assist in centering the spider above the sleeve. l

A friction jack v44 of conventional construction is provided to receive and engage the shaft. to

` exert a thrust upon the shaft upon operation ofl the jack handle 46. In Figure 1 in which the Adevice is shown as being used to withdraw or pull the 'liner I2 out vof the bore in the block, the l jack is supported upon the spider 32 and may be operated to lift the shaft I4. To insert the liner engaging lower end of the shaft through the liner the carrier yoke is tilted to extend substantially parallel to the shaft as shown in dotted outline Figure 4. `the structure of Figure 6 may be -empioyed and tapered pins 89 may be received within tapered openings ln the ends of the yoke and frictionally supported therein to position the tool within the cylinder bore as shown. These pins will fall out when sleeve is forced into place.

In Figure there is shown a hammer device in the form of a shaft section 66 upon which is slidably supported a .Weight 68. Fittings 18 are provided upon opposite ends of the shaft section to maintain the weight thereon.

Oneend tting 18 is provided with a recess adapted to receive the reduced end 12 of the shaft I4 whereby the shaft section 66 forms an extension for the shaft I4 and theweight 68 may be actuated to deliver a` sharp impact thrust through the fitting toy the shaft I4 to start the liner.

in Figure 1. Upon insertion of the lower end of the shaft through the liner, the liner engaging element will'swing by gravity or if desired by application of manual force from theunderside of the cylinder block to extend diametrically of the shaft to engage the lower end of the liner as shown in solid line in Figure 1. 1

In Figure 4 the shaft I4 is shown as externally threaded and a ratchet nut 48 of conventional construction is illustrated as mounted upon the shaft in lieu of the friction jack shown in Figure 1.y In this view of Figure 4 the device is illustrated as being utilized to insert the liner I2. The lratchet nut rests directly upon the thrust washer 42 and asV the nut is rotated about the shaft, pressure is exerted to urge the pressure plate 40 downwardly over the shaft. The pressure plate, as heretofore stated, is freely slidable over the shaft.

In this structure of Figure 4 the carrier yoke 23 supports oppositely directed arms 52 of a different character from the arms 24 of the structure of Figure 1. The arms 52 are adjustably connected by a screw 54 which is held in place by a set screw 3| as hereinabove described in connection with the structure of Figure 1. The center of the yoke is provided with an opening 2i (Figure 4) through which a pry tool can be inserted to engage in notches or teeth 21 carried on the centralv portion of 'the screw to rotate the screw. As in Figure 1, a plate 25 is secured between the two sides of the yoke.

The arms 52 are projected to engage underneath the block I0 within which the liner I2 is disposed. Each arm is cut out as at 56 adjacent to its outer end providing a recess of sumcient depth to receive the'width of the end'of the sleeve liner I2 to insure that the sleeve can be fully received within the bore of the block.

within the bore of the cylinder block underneaththe edge of the liner. When the edge of the liner I2 engages the pins asshown in Figure 4 the pins are moved downwardly resistingly as pressure is exerted upon the liner. The pins can move down sufficiently to permit the sleeve to be fully inserted into the bore in the block or to be advanced even through and beyond the end ofthe bore if such is desired. The pins abut the side wall of the bore and center the lower endof the shaftor rod I4 with respect to thebore.

Instead of` providing the spring urged pins of The construction shown in Figure 1 may be utilizedto withdraw the sleeve as is shown in Figure 4 and the construction shown in Figure 4 may be utilized to insert the sleeve as is shown in Figure 1. When the construction of Figure 1 is utilized to insert the sleeve the spider and leg fixture is removed from the shaft I4 and the friction jack rests directly upon the pressure plate or rather upon the washer 42 which superimposes the pressure plate. The arms 24 are extended laterally suiiiciently far enough to engage the underside of the cylinder block I0. When the construction shown in Figure 4` is utilized to withdraw or remove a liner as shown y'oke of Figure 1 vcan be replaced by the connected armsj52 of Figure 4 or vice versa as is desired. However, for removing the liner, the arms 52 are retracted until they extend laterally a distance equal to or slightly less than the outside diameter of the liner in order to engage the end of the latter without .overlapping upon the cylinder block I0.

What I claim ist;

1. A thrust element comprising a shaft adapted to transmit axial thrust, a yoke pivoted upon one,

end of the shaft to extend diametrically or axf ially thereof, a pair of arms mounted slidably within the yoke and projecting beyond opposite ends of the yoke, the outer end of each arm beyond the yoke provided with a recess and a plunger spring urged outwardly beyond the recess and resistingly depressible into the recess.

2. A thrust element comprising a shaft adapted to transmit axial thrust, a yoke ,pivoted upon one end of the shaft to extend diametrically or axially thereof, a, pair of arms mounted slidably within the yoke and projecting beyond opposite ends of the yoke, the outer ends of said larms each provided beyond the yoke with a plunger spring urged transversely of the arm to be disposed parallel to the axis of the shaft when the yoke is extended diametrically of the shaft. l

3. A thrust element comprising in combination, a rod adapted to transmit axial thrust, a yoke pivoted to one end of the rod to swing to a position parallel thereto .or diametrically thereof, a pair of arms slidably mounted within said yoke for projection from the opposite openends thereof, a plunger supported within the outer end of each armfor shiftable movement transversely thereof and projection outwardly therebeyond.

4. A thrust element comprising, in combination, a rod supported to exert axial thrust, a channel-shaped open end carrier, means pivotally connecting said channel carrier to one end of said rod for swinging movement of the carrier from a. position diametrically of the rod to a position substantially parallel thereto, a pair of members slidably mounted in line with one another within the carrier and arranged to project beyond the opposite open ends thereof, said members having their outer ends provided with abutments projecting transversely of the members and their inner ends longitudinally threaded, an oppositely externally threaded element threadedly coupling the threaded ends of said members together, said element being rotatable to advance or retract said members relative to the open ends of said channel-shaped carrier, and mea-ns tor holding said element against longitudinal movement within said carrier .while permitting rotation thereof.

GEORGE M. GRAHAM.

REFERENCES CITED 

